<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>无标题文档</title>
<script src="jquery-2.0.3.js"></script>
<script>

//$().css();  $().attr();  set/get

$(function(){
	
	//alert( $('#div1').css('width') );
	
	//$('#div1').css('background','yellow');
	
	/*$('#div1').css('background','yellow');
	$('#div1').css('width','300px');*/
	
	//$('#div1').css({ background : 'yellow' , width : '300px' });
	
	alert( $.now() );
	
	//(new Date()).getTime()
	
});

</script>
</head>

<body>
<div id="div1" style="width:100px; height:100px; background:red">aaaa</div>
</body>
</html>
